package org.atguigu.gmall.realtime.app.dws;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import org.apache.flink.api.common.eventtime.WatermarkStrategy;
import org.apache.flink.api.common.functions.ReduceFunction;
import org.apache.flink.api.common.state.ValueState;
import org.apache.flink.api.common.state.ValueStateDescriptor;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.streaming.api.datastream.DataStreamSource;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.api.functions.KeyedProcessFunction;
import org.apache.flink.streaming.api.functions.windowing.ProcessAllWindowFunction;
import org.apache.flink.streaming.api.windowing.assigners.TumblingEventTimeWindows;
import org.apache.flink.streaming.api.windowing.time.Time;
import org.apache.flink.streaming.api.windowing.windows.TimeWindow;
import org.apache.flink.util.Collector;
import org.atguigu.gmall.realtime.app.BaseApp;
import org.atguigu.gmall.realtime.bean.CartAddUuBean;
import org.atguigu.gmall.realtime.common.Constant;
import org.atguigu.gmall.realtime.util.AtguiguUtil;
import org.atguigu.gmall.realtime.util.FlinkSinkUtil;

import java.time.Duration;

/**
 * Project:gmallRealTime
 * Package:org.atguigu.gmall.realtime.app.dws
 * Author: ZengHaiFeng
 * CreateTime:2023/5/4 19:43:47
 * Description: Todo
 * Version：1.0
 */
public class Dws_06_DwsTradeCartAddUuWindow extends BaseApp {
    public static void main(String[] args) {
        new Dws_06_DwsTradeCartAddUuWindow().init(40006,2,
                Constant.TOPIC_DWD_TRADE_CART_ADD,"Dws_06_DwsTradeCartAddUuWindow");
    }
    @Override
    public void handle(StreamExecutionEnvironment env, DataStreamSource<String> ds) {
        ds.map(JSON::parseObject)
                .assignTimestampsAndWatermarks(WatermarkStrategy
                        .<JSONObject>forBoundedOutOfOrderness(Duration.ofSeconds(3))
                        .withTimestampAssigner((obj,ts) -> obj.getLong("ts")*1000)
                        .withIdleness(Duration.ofSeconds(60)))
                .keyBy(obj -> obj.getString("user_id"))
                .process(new KeyedProcessFunction<String, JSONObject, CartAddUuBean>() {
                    private ValueState<String> lastAddCartDateState;

                    @Override
                    public void open(Configuration parameters) throws Exception {
                        lastAddCartDateState = getRuntimeContext().getState(
                                new ValueStateDescriptor<>("lastAddCartDate",String.class));
                    }
                    @Override
                    public void processElement(JSONObject value, KeyedProcessFunction<String, JSONObject, CartAddUuBean>.Context ctx, Collector<CartAddUuBean> out) throws Exception {
                        Long ts = value.getLong("ts");
                        String today = AtguiguUtil.tsToDateTime(ts);
                        String lastAddCartDate = lastAddCartDateState.value();
                        if (!today.equals(lastAddCartDate)){
                            lastAddCartDateState.update(today);
                            out.collect(new CartAddUuBean("","",1L,ts));
                        }
                    }
                })
                .windowAll(TumblingEventTimeWindows.of(Time.seconds(5)))
                .reduce(new ReduceFunction<CartAddUuBean>() {
                            @Override
                            public CartAddUuBean reduce(CartAddUuBean value1, CartAddUuBean value2) throws Exception {
                                value1.setCartAddUuCt(value1.getCartAddUuCt() + value2.getCartAddUuCt());
                                return value1;
                            }
                        },
                        new ProcessAllWindowFunction<CartAddUuBean, CartAddUuBean, TimeWindow>() {
                            @Override
                            public void process(
                                    Context context,
                                    Iterable<CartAddUuBean> elements,
                                    Collector<CartAddUuBean> out) throws Exception {
                                CartAddUuBean bean = elements.iterator().next();
                                bean.setStt(AtguiguUtil.tsToDateTime(context.window().getStart()));
                                bean.setEdt(AtguiguUtil.tsToDateTime(context.window().getEnd()));
                                bean.setTs(System.currentTimeMillis());
                                out.collect(bean);
                            }
                        })
                .addSink(FlinkSinkUtil.getClickHouseSink(
                        "dws_trade_cart_add_uu_window",
                        CartAddUuBean.class));
    }
}
